Everytime return pump starts up corals slough tissue

[A.VOID]

Having issues where I see multiple corals sloughing tissue everytime the return pump restarts when it's been off for minutes/ hours for tank maintenance.

Obviously pieces are stressing out, but I don't understand why it's happening. Thoughts?

 

[michael.lemke]

More info needed. Params? Return off for hours?

 

[gbru316]

Do you have any additional powerheads that keep running when the return is off?

 

[A.VOID]

Params all in line >>>
7-8 alk
400 Ca
Trates 2
Phosphates undetectable

Yes, powerheads running when pump is shut off. Pump starts up and they slough tissue.

 

[Vanquishxxxx]

Guess the question would be what are u doing in that time ur pump is off?

 

[turtlespd]

Sounds normal to me.

 

[A.VOID]

Could be a water change our it could be sock change and cleaning it the skimmer.
I'm thinking I might have some stray voltage leaking.
Everything is on apex power strips into an ups into a gfci. I don't feel any shock, but ?
I'll try a grounding probe

 

[Scffvariable]

You sure it's tissue and they are not just releasing some slime?

 

[dankreef]

I would think maybe it was the new water your adding im assuming your doing water change ? Sometimes if the parameters are different possibility. Move your returns in a different direction so they don't blow straight into coral if they do.

 

[michael.lemke]

you sure it's tissue and they are not just releasing some slime?

+1

 

[SneekaPeek]

temp change! my guess, I would test temp when you do maintenance, of dt and sump.

 

[Snookster]

You sure it's tissue and they are not just releasing some slime?

+2

Had same issue, was slime buildup in line.

 

[A.VOID]

I thought they were just slimming at first to, but a couple have gone downhill and browned with some splotching on their tissue.
I can see temperature change for the water change, but it's usually within a couple degrees, but I also see it when I just shut the pump off for 30 mins to change the filter sock and clean the skimmer. That's why im wondering if I have stray current

 

[sirreal63]

Are you sure it is not just mulm from the return pipes being blown out? Mine always blows out a little from the return when it it turned back on.

If the tissue were being blown off, it would not expose brown coral, it would expose skeleton.

 

[power boat jim]

Are there air bubbles being blown out when the pump comes on? Air or even micro bubbles will cause coral to slime. If a stream of water is blown on them constantly they will slough off tissue and you will see the skeleton, but as stated above the skeleton is white not brown.

Coral turning brown is usually indicative of a light or nutrient issue.

 

[A.VOID]

thx all for thoughts

 

[GSMguy]

Sounds normal to me.

No, it does not "sound normal"

 

[kaserpick]

Have you tried the grounding probe yet? Sorry you're having these problem. It's not normal in my experience.

I hope it is stray voltage; that should make it any easy fix!

 

[A.VOID]

I don't have a grounding probe yet, but I kind of ruled that out.
I unplugged everything from my UPS and plugged all directly into the GFCI. Kicked on all heaters, etc and the GFCI didn't throw.
Since I read mixed thoughts on the probe, I balked on buying one. Open to other recommendations though.

 

[sirreal63]

Post some pics of the corals in question, it will help.